Remove Java std::list::assign

This doesn't exist in equivalent Java containers. If we put it back, the
full set of overloaded assign wrappers ought to be added.

Lib/java/std_list.i

@@ -165,7 +165,6 @@ namespace std {
     list();
     list(const list &other);
     ~list();
-    void assign(size_type n, const T &value);
     %rename(isEmpty) empty;
     bool empty() const;
     void clear();